Thermocouple used in kitchen burning gas is how to work?

It is well known that the thermocouple is indispensable in the temperature instrument temperature measuring tool. Thermocouple in addition to applications in many industrial chemical industry and so on big occasions, there are many small place is little not. As long as you are careful enough you will find exist everywhere in our daily life.

take our everyday cooking kitchen burning gas, thermocouple on the kitchen burning gas function is very powerful. Thermocouple in the centre of kitchen burning gas in two lines, plus a ground wire and the center of a line connected to a firearm. So the question is coming, I bought a new igniter thermocouples connected to a firearm no line, so I just did, give it a try, did not think of can also cause thermocouple. So why previous igniter can connect to the thermocouple? What's the use? Actually single thermocouple need to wait for 3 seconds to loosen, don't need to provide current, double thermocouple can immediately let go, one end connected to a firearm igniter provides 5 seconds time of current and electromagnetic valve.

kitchen burning gas furnace head often with a little fire needle and thermocouple flame-out protection needle. Thermocouple kitchen burning gas is directly related to the quality of the ignition of the reaction time and ignition success rate. Thermocouple is actually a temperature sensing element, it directly measure temperature, and the temperature signals into a thermoelectric emfs, through electric instrument converts the temperature of the measured medium.

thermocouple is made up by two different alloy material. Different alloy material under the action of temperature will produce different thermoelectric potential, thermocouple is using different alloy material under the action of temperature of thermoelectric potential is different. Two different ingredients of conductor on both ends of the synthesis loop, when the junction temperature is not at the same time, in the circuit will generate electromotive force, this kind of phenomenon called the thermoelectric effect, and the electromotive force called thermoelectric potential. Thermocouple is to use the principle of temperature measurement, which is directly used as a measure of medium temperature is called the work at the end of the end, the other end is called the cold end; The cold end connected to the display instrument or meter, display instrument will point out the thermocouple thermoelectric potential.

the height of the thermocouple should be flat and fire cover height, should pay attention to keep the distance between the thermocouple and fire cover. Thermocouple and fire cover distance not too far, be kept in the 4 & plusmn; 0. The distance of 5 mm, if the installation position is too low, thermocouple heat is insufficient, produce thermoelectric power is not enough, will not make, electromagnetic valve, and the installation location is too high, the flame contact is too big, easy to burn the thermocouple, in the same way, too far, will be enough thermoelectric potential, will not make the electromagnetic valve and off.

thermocouple flame-out protection device is mainly composed of two devices, one is a thermocouple, another is the electromagnetic valve. Thermocouples used for induction heat, flame and transform heat into electricity, to the solenoid valve, and provide energy for electromagnetic valve and; Electromagnetic valve by accepting thermocouples provide energy, open or closed gas path.

when the top of the burning flame thermocouple, thermocouple temperature rise slowly, the resulting voltage is bigger and bigger, when rising to a certain temperature, the energy generated can make the electromagnetic valve is closed to continue and off; When the temperature of the thermocouple is not after the burning flame, slowly decreased, when the temperature dropped to a certain extent, thermocouple generated electricity can't continue to maintain the solenoid valve and, at this time, the electromagnetic valve is opened, cutting off gas path, kitchen stall.

need, thermocouple electricity generated is very low, cannot drive solenoid valve himself from open to closed state, can only maintain the solenoid valve closed. Electromagnetic valve shifted from open to closed state, we need to push pressure cookers knob. Haven't

thought before thermocouple how close to our daily life, through our three chang instrument engineer this simple introduction, I suddenly realized that the small thermocouple would affect our three meals a day, a finding that let I deeply realize the importance of thermocouple.